Friction-clutch.



H. M. NORRIS. FRICTION CLUTCH. APPLICATION FILED AUG.17, 1910.

Patented June 25, 191.2.

i'llllll ll I Henry m .Norri s, amwbw HENRY IVE. NORRIS, F CINCINNATI, OHIO, ASSIG-NOR TO THE CINCINNATI BICKFORD TOOL COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

To all whom it may concern:

FRICTION-CLUTCH.

resonate Be it known that I, HENRY M. NORRIS, a CltlZGIl of the United States, residing at Cincinnati, Ohio, have invented a new and useful Improvement in Friction-Clutches, of which the following is a specification.

My invention relates to friction clutches for other suitable purposes and the objects of my improvements are-to provide an adjust- I line bb of able fulcrum for the cam levers to compensate for .the'wear of the friction ring; to pro Y vide means for controlling the expansion of the friction ring to a predetermined amount for preventing excessive strain or' wear thereon; to provide a perfectly balanced clutch adapted for high speeds; and taprovidesimple and durable constructionland assemblage of the various members for secure ing facility of operation andefiiciency of ac-. tion. These ob ects are attained in the following described manner as illustrated in the accompanying. drawings,- in which Figure 1 1s a longitudinal section of. a friction clutch'embodying my improvements; Fig. 2a transversesection on the line H of Fig. 1;Fig. 3 a plan of the sleeve with the actuating plunger therein for the cam levers, Fig. 4 a perspective View of said 1evers, and-Fig 5 a transverse section on the ig. 1, with parts broken away. In the drawings, 1 represents a driving I 'shaftformedwith a longitudinal groove 2,

3 a sleeve splined thereon by means of key t secured therein and slidably engaging at one end with said groove. Said sleeve is formed with a transverse notch 5 and with a longi- "tudinal groove 6 terminating at its end therein. A stepped collar 7 formed with e peripheral flange 8v and with a gap 9 in registration with the notch 5 is secured in rotative engagement with sleeve 3 by means of the engagement of the other end of key 4 therewith and prevented from longitudinal movement by means-of a set screw 10. A

grooved collar 11 longitudinally movable on sleeve 3 by means of a hand lever not-shownis secured to a plunger 12 which is thereby movable within groove 6; Said plunger is formed with parallel edges which terminate with a short taper in a point 13.

A taper pin 1e adjustably threaded in the I stepped collar 7 serves as an adjustable ful- Specification of Letters man. Application filed August 17, 191i). Serial No. 5?'7,615.'

crum for twin caml evers ldwhich inovably engage near one end therewith and/are ex- Patented June 25, 1912.

tended through gap. 9 and terminate at the other end within notches 5-as shown in Fig.

2, and with their adjacent edges in registrationwith the" opposite sides of the point of plunger 12. v

A split contractile friction ring 16 secured on the collar 7 by means of a key 17 terminates in movable clamping engagement with the twin cam levers 15, as shown in Fig.2. A bevel gear 18 formed in its rear endwith a counter bore 19 and with acircular groove 21 in registration with the taper pins let-is mounted idly on sleeve 3 with said counter bore loosely inclosing the friction ring 3 and withthe annular wall 22 thereof in movable engagement with the peripheral flange of collar 7 as shown in Fig. 1. A driven shaft 23 journaled in bearings not shown is pronately in opposite directions with its taper point between and beyond the correspond ing twin cam levers for actuating said leversv to expand the friction ring into frictional engagement with the inside of 1wal122 for the. sliding turning the gear 18 with the gear24t for.

driving shaft 23. The adjustment of the taper pin longitudinallyserves to cause the cam levers to take up any wear on the friction ring that its frictional engagement'with the wall of the counter bore may be maintained constant during the contact; of said.

levers with'the parallel edges ofthe plum-.-

ge'r regardless 'of' the furthermovement thereof.

The clutch described may be duplicated at the other side of gear 24 if desired for driving the shaft 23 in a reverse direction. The longitudinal adju'stment'of the sleeve-3 on shaft'l permits shaft 23 to, be adjusted to difierent positions thereon for adapting it to. drive the spindle. in different adjusted positions on the arm of.a radial drill. Havin fully described my improvements what I c aim as my invention vand desire to secure by Letters Patent of the United States is 1. In a friction clutch the combination with a shaft formed with a spline groove,

a sleeve slidable thereon and formed with a loo radial slot, a stepped collar encircling the sleeve and formed with a key seat, a key secured at one end in the key seat and terminatingat the other end through the slot in the sleeve and in slidable engagementwith the spline groove, of a flanged idle member on the sleeve concentric with the collar, a contractile friction ring secured to said collar, and lever mechanism for expanding said ring into frictional engagement with the idle member. A

2. In a friction clutch the combination of ashaft, a sleeve-splinecl thereon, a collar secured on the sleeve, a contractile ring se-. cured on the collar, an idle member on the sleeve concentric with the collar, twin levers carried by the collar and engaging with the ring, and a movable wedge for simultaneously actuating the levers with the ring into frictional engagement with the idle member. I

3. In a friction clutch the combination of a shaft, a sleeve splined thereon and formed with a longitudinal groove, a collar secured on the sleeve, a contractile split ring secured thereon, twin levers carried bythe collar engaging with the respective ends of the ring, a member mounted to turn on the sleeve concentric *with the collar, and a tapered key movable Within the groove in the sleeve for actuating the levers simultaneously to expand the ring into frictional engagement with the idle member.

' H. M. NORRIS.

Witnesses: q

R. S. CARR, V. T. BLAIR. 

